Clamp



U. i". SMTH, CLAMP. APPLICATION FILED DEC. Z, 1920.

Paemed 09. M, M222 A720' o rim/ff,

` Patented @et l0, 1922.. j

Parana DANIEL F. SMITH, OF ST. LOUIS, MISSOURI.

etai/rr. j

Application filed December 2, 1920. Serial No. 427,685.

To all 'whom t may concern.:

Be it known that I, DANIEL F. SMITH, a citizen of the United States,residing at St. Louis, and State of Missouri, have invented certain newand useful Improvements 'in Clamps, of which the 'following is aspecification, reference being had therein to the accompanying drawing.j

My invention relates to improvements in clamps and has Jfor its objectto provide a primary clamp or vise, for saw-sharpening, joinery and likepurposes, having attached thereto a secondary clamping member wherebythe tool is secured to a work-bench.

In the drawingsn Fig. 1 is a perspective view of a clamp embodying myinvention, but incompletely assembled, the lower, adjustable jaw of thesecondary clamp (illustrated in Fig. 2) not being in place. j

Fig. 2 is a perspective view of said lower jaw of the secondary clamp. l

Fig. 3 is a side elevation of the fully assembled clamp, secured to awork-bench and equipped for saw filing.

In the drawings there is illustrated' a work-bench top 4 having abeveled edge 5. 'Io said top 4 the main or primary U-shaped channeledclamp `6 is secured by the lower adjustable jaw 7, whose construction isshown in Fig. 2, it being formed with a slot 8, a beveled edge 9engaging indentations 10 on the outer face of the clamp-arm 11, abearing face 12 having a lug 13 to engage with indentations 14: on theinner face of the clamp-arm 11, prongs 15-15 which straddle theclamp-arm 11, and an upturned lip 16 to engage the lower face of thebench-top 4;

(lo-operating with said jaw 7 `is a presserfoot 17 carried by the wingedscrew 18, the screw 18 being seated in either of the threaded bores 19in the bar 20, so that the presserfoot 17 may be mounted properly withreference to the location of the outer edge of the `surface which it isto engage; being mounted as in Fig. 3 when applied to a beveled-edgebench top. The clamp 6 being constructed of channeled metal as shown,the clamp-arm 21 has attached to it the block 22 through which thethumb-screw 23 is mounted as shown; and a screw 24 serves to looselyhold in place against the inner face of the clamp-arm 21 the block 25.The clamparm 11 has an inturned upper terminal 26, to the inner face ofwhich terminal 26 the block '27 is secured by the screw 2S or likeattaching means. The work to be held, here illustrated as the saw-blade29, is fastened in place between the blocks 25 and 27 by the pressure ofthe thumb-screw 23.

The purpose of forming the terminal 26 as shown is to permit theadjustable jaw 7 to have clearance outside of the blocli 27 (see Figi3).

aving thus described myinvention, what I claim as new and desire to havesecured to me by the grant of Letters Patent, is-

1. A clamp comprising a channeled U- shaped primary clamping member;opposing blocks `mounted within said member; a thumb-screw arranged toexert pressure upon one of said blocks; a secondary clamp comprising a`bar `iixed to said primary clamping member and a screw carrying apresser-foot and mounted through said bar and adjustable toward `andfrom said prmary clamping member; and a jaw adjustably mounted on saidprimary clamping Ifnember beneath the plane of said presseroot.

2. In a clamp, .in combination with a primary clamping member, asecondary clamp comprising a bar carrying a presser-foot adjustabletoward and from said primary clamping member; and a jaw slidably mountedon said primary clamping member beneath said presser-foot with means fortemporarily and rigidly holding said jaw in place upon said primaryclamping member.

In testimony whereof I hereunto affix my signature.

DANIEL F. SMITH.

